Crystal oscillators are loosely divided from the frequency they operate at and whether they are elementary oscillators—function for the frequency marked within the can or at even multiples of that (overtone oscillators). We current a Nd:GdVO4 bulk crystal oscillator with >70 WTEM00 laser output dependant on the orthogonal thermal compensation https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html